<template>
  <div class="list" ref="wrapper">
      <div>
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">{{this.currentCity}}</div>
                </div>
            </div>
        </div>
        <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
                <div class="button-wrapper"
                 v-for="item of hot"
                  :key="item.id"
                  @click="handleCityClick(item.name)"
                  >
                    <div class="button">{{item.name}}</div>
                </div>
            </div>
        </div>
        <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
            <div class="title border-topbottom">{{key}}</div>
            <div class="item-list">
                <div class="item border-bottom"
                v-for="innerItem of item"
                :key="innerItem.id"
                @click="handleCityClick(innerItem.name)"
                >{{innerItem.name}}</div>
            </div>
      </div>
  </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>
<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
      &:before
        border-color:#ccc
      &:after
        border-color:#ccc
    .border-bottom
      &:before
        border-color:#ccc
.list
    overflow: hidden
    position:absolute
    top:1.58rem
    left:0
    right:0
    bottom:0
    .title
        line-height:.54rem
        background:#eee
        padding-left:.2rem
        colro:#666
        font-size:.26rem
    .button-list
        overflow hidden
        padding :.1rem .6rem .1rem .1rem
        .button-wrapper
            float left
            width:33.33%
            .button
               margin:.1rem
               padding:.1rem 0
               text-align:center
               border:.02rem solid #ccc
               border-radius:.06rem
    .item-list
        .item
            line-height:.76rem
            padding-left:.2rem
</style>
